Detector-relief device.



M. P. FIELD. DETECTOR RELIEF DEV'IGE. APPLIUATION FILED DEG.'21. 1906.

\ 1, 1 1 5,798. l Patented Nov. 3,1914.

Mew;

Vof Massachusetts, have invented an lI `piovement in Detector-Relief Devices, of

MILLARD r. FIELD', oii BosToN,iviAssAciiUsETrs.

DETECTOR-RELIEF DEVICE.

To all whom t may concern:

Be it known that I, MILLARD F. FIELD, a citizen of the United States, residing at Boston, in the county of Suffolk and State m..

which the following description, in connection with the accompanying drawings, is

a specification, like letters onv the drawings representing like parts. p v

My invention provides an automatic stop vmotion for looms, in which all injurious pressure on the warp detector (which term I use to includeany equivalent detecting device) is done away with and is replaced by a delicate relief mechanism which rel lieves the detector of all strain, so that an extremely light, delicate detector may be employed.

is now commonly employed, the detector drops between a comb movably carried by the detector-supporting frame and an arm of the vibrator, so that the entire force of the vibrator is brought against the frail detector, which is obliged to withstand this heavy pressure every time the loom is automatically stopped. The result is that certain kinds of detectors cannot be used, as for instance an open detector is so slender and light that it would be bent and injured by the heavy pressure of the vibrator against the saine in order that the vibrator should be stopped by the dropping of the detector. It is often desirable however to employ light, open detectors. By my invention any kind of detector may be employed, as my invention protects the detector from all in.- jurious pressure and injury. To this end I provide an auxiliary relief device, so constructed and positioned that it is set by the dropping or setting movement of the detector, and when set it coperates with the shipper actuating mechanism to move the `shipper to loom-stopping position. This relief device preferably coperates with the vibrator of the loom, and in the following drawings I have shown several embodiments thereof, in'each ofwhich it will be observed 'the relief device is so delicately poised and located that it is swung into actuating position by the presence of the detector without offering substantial resistance or bringing any pressure against the detector, the stopping action of the reliefdevice being entirely independent of the detector and de- Speciicationof Letters Patent.

tion.

Patented Nev. 3,1914.

Application filed December 21, 1906.` Serial No. 348,894.

pending solely upon the relative position. of the relief device andthe vibrator or other shipper actuator.

In `the drawings, Figures 1 and Q are views in cross-section and frontelevation of a suficient portion of a loom to enable my invention'to be readilyl understood; and Fig.

'3 is a fragmentary view similar to Fig. 1,

showing the parts in loom-.stopping posi- Adjustably supported on the frame 1 of ythe loom isa usual detector frameA 2, on

whose transverse wires or detector guides 3.

any desired'ikind of detectors 4L are mounted to cooperate with the warps 6 passing over usual lease rods 7, all in usual manner. The

dered rigid by usual frame sidesk 8 and brace bar 9 and rod 10, which Ahowever do not constitute any essential part of my invention.

.Pivotally mounted in convenient position for coperating vwith the detectors 4: are opposite relief mechanisms, herein shown as comprising bars or transverse rails or plates y11 suspended by wings 12 rigidly from` rocker shafts 13 to the outer ends of which vare fixed depending hooks 14 preferably made adjustable by suitable means, as a slot 15 in a plate 16and a set screw 17 in an arm 18. The opposite arms 18 of the opposite relief devices arenormally held toward each other by a spring y19, suitable stops 2O being provided to limit their inward movement. The actuating bars or rails 11 extend across the loom in position to be engaged .by the lower ends ofthe detectors whenever lwell known manner, for example, as shown in the patenty to Allen, 640,154, Dec. 26, 1899, or the patent to E. S. Stiinpson, 678,824, dated-May7,"1901. Adjacent the catches or 'hooks le I provide oppositely extending arms 25 projecting rigidly from/the vibrator rod or',` shaft 24 and carrying at n their freeends stop pins 26 in position to be engaged by oneor the other of the hooks 14 `detector frame is held together and ren-` of the relief devices when the latter are moved from inoperative position Fig. 1r to operative position as shown in Fig. 3.

From the above description it Will be readily apparent that as long as the loom is Working properly and the detectors therefore remain raised as shoivn in Fig. 1, the

relief devices remain pulled inwardly by the light spring 19, but the moment that a warp thread breaks the corresponding detector instantly falls and as the vibrator 22 swings over, the tip engages the depending detector and instantly pushes it over -to the position shown in Fig.e3, thereby rocking the relie-f device into stopping position so that its hook 14 is in the path of the adjacent stop pin 26 andthereby stops said pin, and through the connecting mechanism stops the loom. It Will be observed that the stopping strain or heavy pressure of the vibrator does not come upon the detector but comes directly on the relief device, and the latter yields and affords relief against damage to the delicate detector. The stop pin 26 strikes downwardlyr on the hook 14 so that the entire stopping strain is transmitted in a straight line to the shaft 13 and is taken up by the rigid and strong detector frame, so that the delicate detector itself is relieved of all rough usageL and cannot be injured in the slightest. IVhen the vibrator tip 21 strikes againstthe detector the latter and the relief device yield forwardly freely Without offering any substantial resistance, instead of moving against a fixed rigid comb as heretofore. In other Words, the detector does not itself stop the vibrator, but simply moves an intermediary part into position so that the latter can stop the vibrator or can set mechanism into motion Which Will stop the loom.

I believe that I am the first to devise means for accomplishing the above result, and accordingly I Wish it understood that my invention is not restricted to any specific mechanism but may be embodied in a Wide variety of mechanisms.

It will be understood that the particular embodiment of the invention will vary according to the kind of loom in which it is to be used, and will depend largely upon the formv of shipper mechanism or stopping device with Which the loom is provided.

The invention broadly stated resides in providing a loom-stop actuator Which is set in operation merely by the Warp detector or stop-.motion detector, so that the detector itself is not required to itselfperform the stopping operation. In other Words, I interpose an intermediary stopping device which performs the stopping operation and rotects thedetector by relieving the latter of the severe strains and'usage to Which it has previously been subjected. All that the detector is required to do is to place the intermediary in proper position for performing its stopping function. The detector itself receives none of the stopping pressure, Whereas previously it received all the stopping pressure.

It will be understood that my invention is in no Way dependent upon any particular form of stopping mechanism or connections between the detector and the stopping mechanism, but that the stopping mechanism and connections thereto may be Widely varied. All that is necessary in order t0 carry out my invention is to interpose between the detector and said stopping mechanism or connections means for actuating the stopping mechanism as distinguished from requiring the detector itself to'actuate the stopping mechanism.l

Having described my invention What I claim as new and desire to secure by `Letters Patent is,

1. An automatic stop motion for looms, comprising a Warp detector movable into loom-stopping position when said Warp breaks, a vibrator arranged to vibrate adjacent said detector, ay yielding relief device in position to be actuated by said detector and vibrator, and movable stopping means in the path of said relief device cooperating With the latter to stop .the vibrator.

2. An automatic stop motion for looms, comprising a Warp detector movable into loom-stopping position when said Warp breaks, a movable relief device arranged to engage the ydetector when in the latter position, a vibrator arranged to engage the detector opposite said relief device and thereby actuate the relief device, and stopping means carried by the vibrator to be engaged by said relief device when the latter is actuated by the vibrator.

3. An automatic stop motion for looms, comprising a Warp detector frame, a series 4of Warp detectors mounted therein and arranged to move independently into loomstopping position when their respective Warp breaks, a movable relief device havino' a transversebar. in position to be engage by any one of said detectors when in loomvstopping position, a vibratorrod, a transversely extending vibrator operated thereby in the path of said detector when in said loom-stopping position, and means actuated `by said relief device for stopping the vibrator when the latter engages the'detector which is in loom-stopping position.

4. An automatic stop motion for looms,

vcomprising a war-p detector frame, a series of detectors mounted therein and arranged to move independently into loom-stopping position upon the breaking of the given Warp, a movable relief devlcexhavmg atransyverse bar1 in osit-ionv to be moved b v an one of said detectors When in loom-stopping position, a vibrator rod, a transversely eX- In testimony whereof, I have signed my 1K0 tending Vibrator operated thereby in the name to this specification, in the presence of path of said detectors When in said loomtWo subscribing Witnesses.

stopping position, and a stopping member MILLARD F FIELD extending rigidly from said vibrator rod in position to be stopped by said relief de- Witnesses: vice When the latter is moved into stopping GEO. H. MAXWELL, position by the engagement of the vibrator EDWARD MAXWELL. With a detector in loom-stopping position.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

